Range from the cheapest single storey extension £43600 (MICHAEL PANG BUILDING SERVICES based in BS49) to the dearest single storey extension £54800 (MERIT SW LTD based in Bs20).
Comparing extension builders estimates for fitting a downstairs toilet gives you an idea of who will be better value but the best way to compare costs is to get actual quotes.
What to do - Get rates and quotes to build a single storey extension in Portishead by posting a job with HaMuch and we will send it to extension builders in Portishead.
Job | Estimate |
Underpinning a house | £17281 |
Build a two storey extension | £87672 |
Build a timber frame extension | £25781 |
Install a swimming pool | £80781 |
Cost to build a single storey extension | £45622 |
Cost to build a side return extension | £35038 |
Install an RSJ | £1981 |
Build an outbuilding | £9781 |
Build a mansard loft conversion | £51781 |
Cost of a loft conversion | £31698 |
Build a kitchen extension | £41781 |
Build a hip to gable loft conversion | £41781 |
Build a granny annexe | £86781 |
Build a garden office | £9781 |
Convert a garage | £15781 |
Build a new garage | £18281 |
Build a flat roof extension | £21781 |
Build a dormer loft conversion | £41781 |
Lay a concrete foundation | £6031 |
Convert a bungalow loft | £28781 |
Basement conversion cost | £35038 |